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(No Model.) 8 Sheets-Sheet 1f,

H. BURSON. ORE GRUSHING MILL.

No. 518,563. Patented Apr. 17, 1894.

(No Model.) 3 Sheets-Sheet 2.

H.BURS0N. ORB RUSHING MILL. No. 518,563. l Patented Apr.y 1'7, 1894.

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l Z I d /l THE NAYIONAL LTMOGRAPNING CUMFANY.

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(No Model.) 1 BURSON.

o RUSHING MlLL. A No. 518,563. Patented Apr. 17, 1894..

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3 Sheets-Sheet 3,.

UNiTEn" STATES' PATENT OFFICEa ,HARVY BURsON, orwIomTanANsAs AssIGNoR or ONE-THIRD To JOHN y H. ELSPASSAND JOEL H. WHEELER, OF PUEBLO, COLORADO, JOHN M. y. WARE, OF ARKANSASOITY, KANSAS, AND THOMAS RUSSELL, OF PUEBLO,

COLORADO;

ORE-CRUSHINGMILL.

SPECIFICATION `formingpartof Letters atent No. 518,563, dated April 1'?, 1894.

l Application tiled .Tunei i3, 1892. Serial No. 436,613. (No model.)

`To @ZZ whom t may concern: Be it known that I, HARVYBURSON, a citizen of the United States of America, residing at Wichita, in the `county of `Sedgwick and State of Kansas, have invented certain new and useful Improvements in Ore-Crushing Mills, of which the following isa specification, reference being had therein to the accompanying drawings and'theletters andligures of ication,in which` Figure l. is a top plan View, showing above a central horizontal line, the complete structureand below said line, the roll housings in `11,5 horizontal section; Fig. 2. a top plan of the `mill pedestal, and bed supporting spider to reference thereon, forming a part of this specithereon, and also the drive pulley andpinion` for operating the mill bed; Fig. 3. a side elevation of themill, representing portions therezo of invertical section, to more clearly show construction; Fig. 4. a detailed section of the mill crushing bed;` Fig. 5. a detailed perspecy tive of one of a series of plates for clamping y screen plates to said bed, and Fig. 6.asimilar 2 5 view of one of a series of` said screen plates.

This invention relates to certain improvements in ore crushing mills, designed more es- `pecially for crushing and pulping quartz and ores, and consists `in the construction and aro rangement of parts, which improvements are` fully set forth and described in the following specification and pointed out in the claims.

Referring to the drawings A represents a" pedestal, preferably made of wood timbers as 3 5 shown. i E represents a cast iron spider having fine radial arms, which arms are provided at each end portion with `heads 4 to which bar iron housing uprights l are secured, by bolts as 4o shown, and terminate with lugs `5 by means y of which the spider is bolted to the pedestal, by placing bolts through corresponding holes of'both lugs and pedestal. y u V is an annular V shaped ball track of the said spider and a are a series of metal balls arranged in said hollow track as shown.

S represents a shaft boxed to the pedestal A, through the agency of boxes D, D, and is provided at its inner end with` a pinion 6 and 5o at its outer end with a drive pulley I.

B represents the ore crushing bed, of the mill, and is made circular in form and open at itscentral portion and has secured to its under surface, by means of cap screws, an annular casting K having formed therein an annular ball track V', inverted and conforming to that shown at V of the spider, which in-V verted track portion rides upon the balls a andthereby `rotatably supports the bed B. Saidannular casting K is further provided, 6o about, and adjacent, the track V' with abevel gear 9, which when the bed is thus set, meshes with pinion 6, and by such arrangement, the bed Bis caused to rotate horizontally, by driving said pinion; being carried during suoli' ro- 65 tary circuit on the balls ct.

`The bed B is provided on its upper side with two annular concentric flanges F and F', the latter being that of the less diameter, and with an annular inclined ledge L, adjacent 7o flangeF and forming the margin of the bed, and between said flanges is formed an annular crushing trough having a radially inclined bottorrt; as shown, and has laid in said bottom upon a spelter bed B" (see Fig. 4,) a chilled cast bed plate B', or said bed may be made of a plurality of sections laid to register at their meeting ends, and thus serve as would a single plate; the spelter which is placed under said chilled bed plates B', is 8o placed as stated, after the said plates have been adjusted to their proper position by means of some temporary supports, by first heating it until it becomes a molten mass, and then pouring it into the space between the bed andsaid plates, when by such means of placing, it fills the entire space between said bed and plates, and when cooled gives a solid and uniform support to plates B- which exactness of support would be difficult to 9o attain otherwise. The bed B is further provided with a series of equidistant upright portions 13, as shown in Fig. 4, and has arranged spanning the spaces between said uprlghts a series of screen plates, shown at 'l0 95 made with their center portion removed and supplanted with a screen l2 of wire fabric or other suitable material, which screen-plates are thus held into position by means of clamp ing plates `11 which are placed to clamp the roo r 's'r l ends oi said screen pla-tes,` and thus held by means of screws or bolts, as shown in Fig. y3.

R represents the crushing rolls of the mill, there being five in number, and each made with a bevel face corresponding with aud adapted to ride upon the crushing bed B of bed B, each roll being provided with a shaft S extending each way therefrom, which are` journaled at each end in the bearings 3, which are housed in the uprights l, l, said journal bearingsv being made respectively, in two parts, and the lower part of each bearing is supported in contact with the journal by means of a coil spring 7 which is sleeved upon the upright shank, or stem, ofa supporting block 8, and engagesthe bearing abouta depending lug of the bearing, which holds itk seated; the block 8 resting in the upper cup shaped side of head 4 of the spider arm, (seev Fig. 3.) The purpose of the springs 7 is, to pro.

Vwill `but lightly engage the bed, and also by means of said springs the lower lportion of said journal bearings, which are essential in holdinga lubricant for the journals, are at all times and at all adjustments yieldingly held inlcontactwith lthe journals to properly supply them with, or prevent the free escape of, a lubricant otherwise furnished.

Arranged between the upper end of each pair of 'housing uprights l--l is a cast block v J, held by means of cross-bolts; each said block being provided, through its vertical center portion, with a screw-threaded hole through which is turned a pressure screw 2, which is socketed at its lower end in afbushion cap c', which is arranged to slide vertically between the housing uprights,and c is arubber cushion arranged interposed between said cushion cap and the upper journal beari'ng 3, as shown. Each housing of the mill is thus provided with a pressure screw andv cushion c, which are for the purpose of mposing a yielding, but heavypressure upon the journals of shafts S, and hence a like pressure of the rolls Rupon the crushing hed B; the pressure screws 2 serving as a means ofA regulating such pressure.

M. represents tie-bars which are arranged connecting and tying together the upper end of the outer series ot' housings, and m are a similarset ot' tie-bars arranged connecting and tying together the outer and inner housings, being arranged in cross manner, as shown, and secured, jointly, by bolts placed through corresponding holes of their end portions, and through the blocks J ot' the uprights, or housings.

H isa hopper arranged at one side of the mill, into which the ore, to be crushed, `is placed and H is a chute of said hopper arranged centrally over bed B, on the bars m" and held in position vby being clipped to said bars, asshowmand Wis a supply pipe leading from said annular pipe, to some source vof water supply, and hasinterposed therein a valve W for regulating vthe supply to the said annular pipe, and Z (see Fig. 3,) are down lead pipes smaller than said annularpipe, and connected-with and depending from said annularpipe for conducting water to and upon the crushing bed B', for the purpose of supplying water to the ore during the crushing thereof, in order that when crushed a pulp may be made, which pulp is discharged, through the side screens lof the bed iiange, after a suflicient quantity has been made, as rapidly as it raises tozsaid `screenfand from said screen it flows down upon and fromthe ledge L of l'the bed B,-and P is anannul'ar copper pan, or trough arranged about under said ledge,and is, in use, charged ywith quick-silver, and upon such deposit of quick silver said pulp is discharged, which permits the metal particles to settle therein `while the remaining-portion of the pulp is washed away.

Said annular pan P is madewith its bottomV inclining each way from a given point to a given opposite point where it is provided with a erosspartition,as shown at'Plin Fig. 1, and in the bottom Lof each terminal part, either side of said partition is a drawing-off hole P` which are fitted with plugs, to retainthe quick silver when operating the mill, and P are spouts arranged below said holes for conducting the discharge fromk said holes, when theiry `hold them down upon the bed, crushes the ore, the ore coming-under each roll in its order, which, at each roll action assists insuch crushing u'n'til finally it is thoroughly crushed, and as the iow of water upon'the bed is continuous, a pulp is 1nade,which, as rapidly as it becomes sufficiently neows off with the overflow water, while the coarser particles re main until they become reduced and sufficiently tine to likewise ilow off.`

Having thus described my invention, what I claim as new and useful, and desire to secure by IretterSPatent, is 'as follows:

l. The combination, in the mill described, of thepedestal, the spider fixed upon the pedestal, and provided with the radial arms,

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having the'heads to which the housing upn p rights are secured, and with the grooved ball track; the housing 'uprights and their connecting head blocks, and tie bars; the rotable crusher bed'mounted on balls arranged to travel in said spider track; the gear mechanism for driving said bed; the crushing rolls mounted on shafts journaled in said housings, by means of vertically sliding bearings, and the pressure screws and interposed cushions, for imposing a yielding and Variable pressure of said rolls upon the crushing bed, substantially as and for the purpose set forth.

2. The combination, in the mill described, of the crushing bed provided With equidistant upright portions arranged about upon its side flange; of the screen plates placed to span the spaces between said upright portions; and of the plates, and screws, for ho1ding said screens into position, substantially as set forth.

3. In the mill described, the combination with the ore crushing bed of the chilled plate or plates arranged tolform the Wearing surface of said bed; and an interposed bed of spelter, or like material, substantially as specie 5 fled.

HARVY .BURSON. Witnesses:

L. SIMPSON, HARRY M. HILL. 

